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Fencer Vulns
high 7.8

CVE-2020-8177 json

curl 7.20.0 through 7.70.0 is vulnerable to improper restriction of names for files and other resources that can lead too overwriting a loc…

published 2020-12-14 5 y ago modified 2026-10-14 26 d ago also EUVD-2020-29059 , JLSEC-2026-1331

cvss
7.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.3%
EPSS 1.3% chance of exploitation in 30 days, percentile 70%
public exploits
0
none known

Summary

curl 7.20.0 through 7.70.0 is vulnerable to improper restriction of names for files and other resources that can lead too overwriting a local file when the -J flag is used.

Patch / fix

  • julia LibCURL_jll 7.71.1+0
  • Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP V3.1.5
  • Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP V3.1.5
  • Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP V3.1.5
  • curl Debian 14, Debian 13, Debian 12 7.72.0-1

debian advisories DEBIAN-CVE-2020-8177

  • curl Ubuntu 16.04 LTS 7.47.0-1ubuntu2.15
  • curl Ubuntu 18.04 LTS 7.58.0-2ubuntu3.9
  • curl Ubuntu 20.04 LTS 7.68.0-1ubuntu2.1
  • curl Ubuntu Pro 14.04 LTS 7.35.0-1ubuntu2.20+esm4

ubuntu advisories UBUNTU-CVE-2020-8177

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • curl RHEL 7 7.29.0-59.el7_9.1
  • libcurl RHEL 7 7.29.0-59.el7_9.1
  • curl RHEL 8 7.61.1-14.el8
  • libcurl RHEL 8 7.61.1-14.el8
  • libcurl-minimal RHEL 8 7.61.1-14.el8
  • curl RHEL 8.2 EUS 7.61.1-12.el8_2.2
  • libcurl RHEL 8.2 EUS 7.61.1-12.el8_2.2
  • libcurl-minimal RHEL 8.2 EUS 7.61.1-12.el8_2.2

red hat advisories RHSA-2020:5417RHSA-2020:5002RHSA-2020:4599

  • curl SLES for SAP 15, SLES 15-LTSS, SLE Module for Basesystem 15 SP1 +2 more 7.60.0-3.29.1
  • curl SLES 11 SP4-LTSS, SLE Point of Sale 11 SP3 7.37.0-70.47.1
  • curl-openssl1 SLES 11-SECURITY 7.37.0-70.47.1
  • curl SLES for SAP 12 SP4, SLES 12 SP4, SLE Software Development Kit 12 SP4 7.60.0-4.15.2
  • curl SLES for SAP 12 SP5, SLES 12 SP5, SLE Software Development Kit 12 SP5 7.60.0-11.3.2
  • curl SLE Module for Basesystem 15 SP2 7.66.0-4.3.1
  • curl SLES for SAP 12 SP3, SLES for SAP 12 SP2, SLES 12 SP3-LTSS +8 more 7.37.0-37.47.1

suse advisories SUSE-SU-2020:1773-1SUSE-SU-2020:14409-1SUSE-SU-2020:1735-1SUSE-SU-2020:1734-1SUSE-SU-2020:1733-1SUSE-SU-2020:1732-1

  • curl openSUSE Leap 15.1 7.60.0-lp151.5.12.1
  • curl-mini openSUSE Leap 15.1 7.60.0-lp151.5.12.1
  • curl openSUSE Leap 15.2 7.66.0-lp152.3.3.1
  • curl-mini openSUSE Leap 15.2 7.66.0-lp152.3.3.1

opensuse advisories openSUSE-SU-2020:0908-1openSUSE-SU-2020:0883-1

  • curl Alpine 3.10 7.66.0-r1
  • curl Alpine 3.11 7.67.0-r1
  • curl Alpine 3.12 7.69.1-r1
  • curl Alpine 3.24, Alpine 3.23, Alpine 3.22 +9 more 7.71.0-r0
  • curl Alpine 3.9 7.64.0-r4

alpine advisories ALPINE-CVE-2020-8177

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • curl Arch Linux 7.71.0-1

arch linux advisories AVG-1194

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2020-8177 updated cvss 5.4

curl: Incorrect argument check can allow remote servers to overwrite local files

  • Red Hat Ceph Storage 2 curl, libcurl Red Hat Software Collections httpd24-curl, httpd24-libcurl
    affected: workaround, no fix planned “The vulnerability is only possible when using the '-J' and '-i' switches in conjunction with the curl command. Executing curl without these switches mitigates the flaw.”
  • Red Hat OpenShift Do 1 openshiftdo/odo-init-image-rhel7 1.1.3-2
    fixed: vendor fix “The vulnerability is only possible when using the '-J' and '-i' switches in conjunction with the curl command. Executing curl without these switches mitigates the flaw.” RHSA-2021:0949
  • Red Hat Enterprise Linux BaseOS (v. 8) curl 7.61.1-14.el8, libcurl 7.61.1-14.el8, libcurl-minimal 7.61.1-14.el8
    fixed: vendor fix “The vulnerability is only possible when using the '-J' and '-i' switches in conjunction with the curl command. Executing curl without these switches mitigates the flaw.” RHSA-2020:4599
  • Red Hat Enterprise Linux BaseOS EUS (v. 8.2) curl 7.61.1-12.el8_2.2, libcurl 7.61.1-12.el8_2.2, libcurl-minimal 7.61.1-12.el8_2.2
    fixed: vendor fix “The vulnerability is only possible when using the '-J' and '-i' switches in conjunction with the curl command. Executing curl without these switches mitigates the flaw.” RHSA-2020:5417
  • Red Hat Enterprise Linux Client (v. 7) curl 7.29.0-59.el7_9.1, libcurl 7.29.0-59.el7_9.1 Red Hat Enterprise Linux Client Optional (v. 7) libcurl-devel 7.29.0-59.el7_9.1, curl-debuginfo 7.29.0-59.el7_9.1 Red Hat Enterprise Linux ComputeNode Optional (v. 7) libcurl-devel 7.29.0-59.el7_9.1, curl-debuginfo 7.29.0-59.el7_9.1 Red Hat Enterprise Linux Server (v. 7) curl 7.29.0-59.el7_9.1, libcurl 7.29.0-59.el7_9.1 Red Hat Enterprise Linux Workstation (v. 7) curl 7.29.0-59.el7_9.1, libcurl 7.29.0-59.el7_9.1
    fixed: vendor fix “The vulnerability is only possible when using the '-J' and '-i' switches in conjunction with the curl command. Executing curl without these switches mitigates the flaw.” RHSA-2020:5002
  • Red Hat .NET Core 2.1 on Red Hat Enterprise Linux rh-dotnet21-curl, rh-dotnet21-libcurl Red Hat .NET Core 3.1 on Red Hat Enterprise Linux rh-dotnet31-curl, rh-dotnet31-libcurl Red Hat Enterprise Linux 5 curl Red Hat Enterprise Linux 6 curl, libcurl Red Hat JBoss Core Services jbcs-httpd24-curl jbcs-httpd24-curl
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

cisa ICSA-23-348-10 updated cvss 7.1

Siemens SIMATIC S7-1500

  • Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0) >= 3.1.0, < 3.1.5 Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0) >= 3.1.0, < 3.1.5 Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0) >= 3.1.0, < 3.1.5 Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0) >= 3.1.0, < 3.1.5 Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0) >= 3.1.0, < 3.1.5
    affected: fixed in V3.1.5, mitigation support.industry.siemens.com

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
6 mo ago

Exploit prediction

1.29% chance of exploitation in the next 30 days, higher than 70% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • hackerone.com https://hackerone.com/reports/887462 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CISA ADP 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CNA 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 4.6 AV:L/AC:L/Au:N/C:P/I:P/A:P
OSV 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
julia LibCURL_jll
<7.71.1+0
7.71.1+0

Affected products

  • n/a https://github.com/curl/curl
  • Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP
  • Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP
  • Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP

Classification

Weakness
  • CWE-99 Improper Control of Resource Identifiers
  • CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.